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39#ifndef QQuickPARTICLEGROUP
40#define QQuickPARTICLEGROUP
41
42//
43// W A R N I N G
44// -------------
45//
46// This file is not part of the Qt API. It exists purely as an
47// implementation detail. This header file may change from version to
48// version without notice, or even be removed.
49//
50// We mean it.
51//
52#include <private/qquickspriteengine_p.h>
53#include "qquickparticlesystem_p.h"
54#include "qqmlparserstatus.h"
55
56QT_BEGIN_NAMESPACE
57
58class QQuickParticleGroup : public QQuickStochasticState, public QQmlParserStatus
59{
60 Q_OBJECT
61 //### Would setting limits per group be useful? Or clutter the API?
62 //Q_PROPERTY(int maximumAlive READ maximumAlive WRITE setMaximumAlive NOTIFY maximumAliveChanged)
63
64 Q_PROPERTY(QQuickParticleSystem* system READ system WRITE setSystem NOTIFY systemChanged)
65
66 //Intercept children requests and assign to the group & system
67 Q_PROPERTY(QQmlListProperty<QObject> particleChildren READ particleChildren DESIGNABLE false)//### Hidden property for in-state system definitions - ought not to be used in actual "Sprite" states
68 Q_CLASSINFO("DefaultProperty", "particleChildren")
69 QML_NAMED_ELEMENT(ParticleGroup)
70 Q_INTERFACES(QQmlParserStatus)
71
72public:
73 explicit QQuickParticleGroup(QObject* parent = 0);
74
75 QQmlListProperty<QObject> particleChildren();
76
77 int maximumAlive() const
78 {
79 return m_maximumAlive;
80 }
81
82 QQuickParticleSystem* system() const
83 {
84 return m_system;
85 }
86
87public Q_SLOTS:
88
89 void setMaximumAlive(int arg)
90 {
91 if (m_maximumAlive != arg) {
92 m_maximumAlive = arg;
93 Q_EMIT maximumAliveChanged(arg);
94 }
95 }
96
97 void setSystem(QQuickParticleSystem* arg);
98
99 void delayRedirect(QObject* obj);
100
101Q_SIGNALS:
102
103 void maximumAliveChanged(int arg);
104
105 void systemChanged(QQuickParticleSystem* arg);
106
107protected:
108 void componentComplete() override;
109 void classBegin() override {}
110
111private:
112
113 void performDelayedRedirects();
114
115 int m_maximumAlive;
116 QQuickParticleSystem* m_system;
117 QList<QObject*> m_delayedRedirects;
118};
119
120QT_END_NAMESPACE
121
122#endif
123

source code of qtdeclarative/src/particles/qquickparticlegroup_p.h